Abstract
The synthesis of MCM-41 analogue mesoporous metallosilicates with high specific surfaces, containing the redox active metals Ti, V, Cr, Mn, Fe, or Co, from an aqueous gel, under reflux is described. Their X-ray diffractograms reveal a highly ordered array of the mesopores. A strong host-guest interaction between the incorporated template molecules and the pore walls, observed by 13C n.m.r., indicates the incorporation of the metals, which is further evidenced by u.v.-vis and 29Si n.m.r. spectroscopy. These mesoporous metallosilicates are active as catalysts for the liquid phase oxidation of cyclohexane with aqueous H2O2 or tert-butyl hydroperoxide.
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